Temperature dependence of the damping constant and the relaxation time close to the tetragonal-cubic phase transition in SrZrO3
作者： H. Yurtseven , A. Kiraci
DOI: 10.1016/J.MOLSTRUC.2016.08.050
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摘要: Abstract The damping constant Γsp due to the pseudospin-phonon coupling is calculated as a function of temperature using coupled model and energy fluctuation close tetragonal-cubic transition (TC = 1443 K) in SrZrO3. Using observed Raman frequencies linewidth (FWHM) soft modes (Eg A1g) from literature, predictions both models studied, are examined for this crystalline system. Values activation U extracted also inverse relaxation time predicted phase studied Divergence behaviour experimentally when TC approached tetragonal cubic diverges crystal. It indicated that second order here,
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